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What to plant after potatoes depends on when the bed becomes free. After early potatoes, there may be time for another summer crop or ready-grown winter vegetables. After maincrops in autumn, the practical choices are usually suitable overwintering crops, a green manure or a protective mulch. Plan the next crop around both its sowing window and your rotation.
Table of Contents
Start with the harvest date
| Bed cleared | Options to check | What matters |
|---|---|---|
| Early or midsummer | Salad leaves, suitable quick beetroot or carrots, young French beans | Use varieties with enough time to mature before autumn |
| Midsummer | Young kale, cabbage or leek plants | Plants raised earlier are often more useful than starting from seed now |
| Autumn | Autumn-planting garlic or onion sets, suitable broad beans, winter green manure | Check variety, local climate and soil drainage |
| Too late or too wet to plant | A surface mulch or suitable bed cover | Protect the soil without working it when saturated |
These are options, not a universal calendar. Read the seed packet or plant supplier’s planting window. A vegetable that survives winter may still need sowing in spring: parsnips and Brussels sprouts are not quick autumn replacements for a harvested potato crop.
Keep the rotation practical
Crop rotation moves related vegetables between beds to help reduce the build-up of some soil-borne pests and diseases. A traditional three-year system can put legumes, onions and roots after potatoes, then brassicas. A four-year plan may separate onions and roots from legumes. Neither sequence guarantees disease-free plants, and known problems need their own advice.
Avoid following potatoes with more potatoes or tomatoes in the same soil. Peppers and aubergines share the family but have fewer problems in a typical UK rotation; consider any known disease history rather than treating every member identically. Remember that turnips, swedes and radishes are brassicas, even though you harvest their roots.
Prepare the cleared bed
- Lift remaining potatoes, including small tubers that could regrow as volunteers.
- Remove weeds and deal with diseased crop material according to disease-specific guidance.
- Check moisture and soil condition before sowing. Avoid digging wet ground.
- Prepare the surface for the next crop and add well-rotted organic matter where appropriate to its needs.
A potato crop does not leave every bed equally depleted. Soil fertility depends on previous feeding, organic matter and the crop removed. Do not add fertiliser automatically or assume crop rotation replaces nutrients. Use the next crop’s requirements and the fertiliser label.
Use green manure when there is a gap
Green manures cover bare soil and help limit erosion and weeds. Choose a species whose sowing season and termination method fit the time available. Winter field beans, winter tares or grazing rye may suit autumn sowing; phacelia or buckwheat can fill an appropriate warmer-season gap.
Legumes can fix atmospheric nitrogen with suitable root bacteria, but they are not a guaranteed replacement for all nutrients removed by potatoes. Green manure mixes also need to fit the rotation: mustard belongs to the brassica family, so consider clubroot history and the following crop.
Plan how you will cut down and incorporate or remove the green manure before buying seed. The RHS advises allowing about a month after digging in fresh green material before sowing the next crop. A vigorous cover crop left too long can become difficult to manage or shed seed.
Choose one next crop you can care for
For a bed cleared in June, a small sowing of a suitable quick salad crop may be more useful than filling every gap. For a bed cleared in October, check autumn planting stock or protect the soil until spring. Record what you plant so a quick follow-on crop is included in next year’s rotation plan.
Useful products for this job
The links below open Amazon UK product searches. Check the exact item, seller, current price and compatibility before buying.
- Garden plot markers: Essential for marking out the different sections of a rotation plan to ensure crops are moved correctly each year. Ensure markers are weather-resistant and durable enough to stay in the soil during digging and cultivation. Search Amazon for Garden plot markers.
- Green manure seed mix: Covers bare soil between crops; species choice determines nitrogen fixation, season and rotation fit. Check if the mix contains brassicas if you plan to plant cabbage or kale in that bed the following year. Search Amazon for Green manure seed mix.
Related garden guides
- Green manures for vegetable beds: choosing and clearing a crop
- Growing salads in a greenhouse through the cooler months
- More greenhouse & growing guides
Sources and further guidance
Guidance researched in September 2026. The feature image is an AI-generated illustration. Product guidance is based on published information, not hands-on testing.